Viator is a complete online booking service therefore does not offer a reservation service via the telephone. However, we offer 24 hour, 7 days a week customer service via email to support your booking questions. Our goal is to respond to each query we receive within 12 to 24 hours. Occasionally it may take up to 36 hours to reply. However, If you have not heard from Viator within 36 hours, please re-submit your request.